Date: Fri, 4 Jan 2008 14:47:18 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: Peter Jeremy <peterjeremy@optushome.com.au> Cc: Ian FREISLICH <ianf@clue.co.za>, freebsd-current@freebsd.org Subject: Re: sbrk(2) broken Message-ID: <20080104124718.GZ57756@deviant.kiev.zoral.com.ua> In-Reply-To: <20080104095132.GC947@server.vk2pj.dyndns.org> References: <20080104002002.L30578@fledge.watson.org> <E1JAg1t-0000Yt-0f@clue.co.za> <20080104095132.GC947@server.vk2pj.dyndns.org>
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--7uy9XegIstZRHI/L Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jan 04, 2008 at 08:51:32PM +1100, Peter Jeremy wrote: > On Fri, Jan 04, 2008 at 08:27:41AM +0200, Ian FREISLICH wrote: > >I have long lived processes that continuously handle very valuable > >data and potentially get very large (several GB). I'd like that > >process to be able to make a rational decision about what happens to its > >memory contents when an allocation fails rather than having the > >proverbial rug pulled out from under it. Rug pulling at any point=20 > >can cost an annual salary or two. >=20 > If you google for freebsd+sigdanger, you will find that this topic > was first discussed nearly 10 years ago. Unfortunately, no progress > appears to have been made, though it crops up every few years. I need to make a slight correction there: some time ago the patch at the http://people.freebsd.org/~kib/overcommit/index.html works, at least I believe so. I implemented overcommit turn-off knob and did the exact anonymous memory accounting. Quite possible, the code rotten since then. --7uy9XegIstZRHI/L Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHfirVC3+MBN1Mb4gRAlFXAKCijH04tmW5ImcTafJ7Cav/+dqTxACg4nrD JGjNqGYTO9EJmCx2zZK5WWE= =Le2r -----END PGP SIGNATURE----- --7uy9XegIstZRHI/L--
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